Electric-light fixture



March 11, 1 930. G. J. HENRY 7 1,750,006-

ELECTRIC LIGHT FIXTURE F 'iled Aug. 16, 1928 [fivenibh Gerald J Hem y Patented Mar. 11, 1930 UNITED STATES GERALD J. HENRY, 015 BOSTON, MASSACHUSETTS ELECTRIC-LIGHT FIXTURE Application filed August 16, 1928. Serial No. 300,053.

This invention relates to electric li ht fixtures of that type which includes a ase or supporting member, a lamp socket and a reflector, and the object of the invention is to 6 provide a novel construction which facilitates' the removal of the reflector and lamp socket from the base member or their replacement therein. 1

In accordance with my invention the lamp socket is carried by the reflector member, and the two constitute a structure which may be removed from the base as a unit. The electrical connection between the base and the lamp socket is provided by twopairs of terminals, one pair carried by the base and the other by the lamp socket, which are brought into and out of engagement by an axial movement, that is, a movement in the direction of the axis of the lamp socket. The

reflector is secured to the base member through the medium of a screw-threaded connection, and in order to permit the necessary axial movement of the terminals when the reflector lamp socket unit is being attached to or detached from the base, a swivel connection between the reflector and the lamp socket is provided.

This swivel connection permits the reflector to have its necessary turning movement for screw-threading it into the base member and at the same time permits the socket member to have an axial movement only, which is necessary to enable the two pairs of terminals to be properly connected.

I In order to give an understanding of my invention I have illustrated in the drawings a selected embodiment thereof which will now be described, after which the novel feaclaims.

Figure 1 is a fragmentary view partly in sectionshowing an electric light fixture according to my invention and illustrating the manner in which the reflector-socket unit is secured 'to the base member;

Fi 2 is a vertical sectional view through the xture showing the parts completely assembled;

Fig 3 is a secti n n line 3-3 f F gtures will' be pointed out in the appended threaded portion 17 is of slightly less diam ter than the b dy f the ne k 6, the y Fig. is a section on line 4- -4 of Fig. 1.

The base member of the fixture is indicated at 1, the lamp socket member at 2 and the reflector member at 3.

The lamp socket member 2 is of porcelain or other insulating material and is provided with the usual screw-threaded terminal 4 and end terminal 5 to engage corresponding terminals of the electric lamp 6.

The base member 1, which also constitutes a supporting member for the fixture, may be conveniently made of cast iron, and it is shown'as carried by a supporting pipe 7, which also constitutes a conduit through which the circuit wires 8 are led. The base member 1 is provided with a block 9 of porcelain or other insulating material which carriestwo terminals 10 and adapted to engage two co-operating terminals 11 that are carried by the lamp socket2, one of the terminals 11 being connected to the screw-threaded terminal 4 of thelamp socket by the screw 12, and the other terminal being connected to the end terminal 5 of the lamp socket by the screw 13. The terminals 10 are shown as U-shaped terminals, while the terminals 11 are in the form of fingers which are adapted to be inserted between the arms of the U- shaped terminals.

The terminals 10 are located in recesses 14 formed in the upper side of the block 9, and said block is provided with apertures 15 through which the terminals 11 of the lamp socket may be inserted in order to make the proper electric connections. 85

These terminals 10 and 11 are constructed so that the are brought into and out of engagement y means of an axial movement, that is, by a movement in the direction of the axis of the lamp socket, or by a push-andpull movement.

The reflector 3, on the other hand, is arranged to be connected to the base l'by a turning movement. Said reflector 3 has a neck portion 16 which is provided at its upper end with a screw-threaded part 17 that is adapted to enter and have screw-threaded engagement with the cap 1. a The screw theb . sary relative axial -U. S. Patent No.

forming the shoulder 18. The base 1 is shown as havin a connecting ring 19 of soft metal whic is screw-threaded to receive the screw-threaded part 17, this feature being somewhat similar to that shown in 1,119,455, December 1, 1914.

The lamp socket 2 and the reflector 3 are connected so that they can be removed from use 1 as a unit, and in order to permit the reflector to have its necessary turning movement for screw-threading it into and out of the base and at the same time to permit the terminals 10 and 11 to have their necesmovement, I have provided a swivel connection between the socket member 2 and the reflector 3.

The reflector member has rigid therein an inwardly extending flange 20 which may be constituted b a ring which is welded or otherwise rigidly secured to the shoulder 18 and which extends inwardly beyond said shoulder. The socket member 2 is formed at its upper portion with a peripheral groove -21 in which the inner edge of the flange 20 is received.

For convenience of. construction the upper wall of the groove 21 is formed by a plate or ring 22 which is secured to the upper face of the socket member 2 by means of suitable screws 23.

There is thus provided a swivel connection between the socket member 2 and the reflector 3 which permits the socket member to turn relative to the reflector.

The relation between the terminals 11, the apertures 15 and the screw-threaded portion 1 is such that when the reflector-socket unit is being assembled with the cap 1, the ter- 'minals 11 will enter the apertures 15 before the screw-threaded part 17 engages the screwthreaded sleeve 19. This is shown clearly in Fig. 1. In assembling the reflector-socket umt with the cap member 1, the terminals 11 will be entered into the apertures 15, as shown in Fig. 1, until the screw-threaded part 17 engages the screw-threaded sleeve 19, and then the reflector 3 will be turned to screw-thread the part 17 into the sleeve 19. Since the terminals 11 of the lamp socket are in the apertures 15 the lamp socket can not turn, and the swivel connection above described permits the reflector to have its necessary turning movement while at the same time allowing the socket member 2 and the terminals 11 thereof to have an axial move-' ment only, such as is necessary to bring the terminals 10 and 11 into proper engagement.

With the construction herein illustrated the wiring of the fixture is facilitated because when the reflector-socket unit is removed ready access is afforded to the connections leading to the terminals 10. Theiconnection of the reflector-socket unit to the base 1 can be easily and quickly made as above described.

base by a relative axial mov I claim 1. In an electric light fixture, the combination with a base member having circuit terminals, of a reflector separable from the base and having means for connecting it thereto by a turning movement and a lamp socket swiveled to the reflector and provided with terminals adapted to be engaged with those' of the base by an axial movement, said swivel connection permitting the engagement of the terminals during the turning movement of the reflector.

2. In an electric light fixture, the combination with a base member having circuit ter minals, of a reflector separable from the base and having a screw-threaded connection therewith and a lamp socket swiveled to the reflector and provided with terminals adapted to be engaged with those of the base with an axial movement, said swivel connection permitting the engagement or disengagement of the terminals during the screw threading of the reflector into or out of the base member.

3. In an electric light fixture, the combination with a base member having circuit'terminals, of a reflector separable from the base and having screw-threaded connection therewith, a lamp socket carried by the reflector and provided with terminals adapted to be engaged with those of the base by an axial movement, and a swivel connection between the socket and reflector which permits the socket to have an axial movement while the reflector is being screw-threaded to the base.

4. In an electric light fixture, the combination with a base member havin circuit terminals and apertures in line t erewith, of a reflector member separable from the base and having screw-threaded connection therewith, a lamp socket carried by the reflector and provided with terminals ada ted to enter the apertures of the base mem er and engage the base member terminals, and a swivel connection between the socket member and the reflector.

5. In an electric light fixture, the combina tion with a base member having terminal-receiving recesses and apertures leading thereto, of circuit terminals in said recesses, a reflector separable from the base member and having a screw-threaded connection therewith, and a lamp socket swiveled' to the reflector and provided with terminals adapted to enter the apertures of the base member and engage the terminals thereof, the swivel connection between the lamp socket and the reflector permitting the engagement of the terminals while the reflector is being screwed to the base member.

6. In an electric light fixture, the combination with a base member havin circuit ter minals, of a lamp socket provi ed with terminals adapted to be engaged by those of the ment. of the gagement with t socket and base, a reflector screw threaded to the base, and a connection between the reflector and lamp socket by which they may be simultaneousl brought into operative enbe base, the lamp socket by an axial movement and the reflector by a screw-threading movement.

In testimony whereof, I have signed my name to this specification. GERALD J. HENRY. 

